I think the following excerpt (translated using Google) says it all, and points to an interesting back story which may be the reason why the GR Yaris is here - having the right backing, from the top, certainly helps:
LINK &
LINK
"
I want to get back a Toyota sports car.
I've always thought so.
86 is an important companion on both rallies and circuits.
Supra has been revived as a car worthy of its name.
But I still want a sports car that Toyota makes with my own hands.
That thought was always in my heart.
I also wanted to make a Toyota sports car that incorporates the technology and skills I gained in the WRC
This GR-FOUR is a sports car made by Toyota from scratch to win in the world.
Until now, until now, Toyota has created cars used by ordinary customers and modified them so that they can be used for racing in those cars.
This time is different. To win the race, for the car to go there GR YARIS is a car created based on a completely reverse idea of what a car should be for a regular customer.
Toyota Motor Corporation President
Akio Toyoda"
Toyota's motorsports line up makes up for an interesting mix:
LINK (Also shows pictures of the GR Yaris Rally Concept, unveiled at the 2020 Tokyo Auto Salon, which of course may look very different when the finalised WRC car rolls out)
Must say that I haven't been quite as excited in the launch of a new car as much as this one, and that is notwithstanding the fact that this, after all, is a homologation special that actually follows the design principles that are sorely missing from most of today's useable cars, and those delivered from say mid-2000's onwards - the 182 Trophy may well have been the last such car, so 15 years is a long time to wait for one!
Another excerpt from the above web site:
"Lightness" is the greatest fighting power
The roof is made of forged carbon born from a new construction method that overturns the common sense of conventional carbon materials . The engine material and door panels (left, right, rear) are made of aluminum, with a multi-material body that focuses on lightness.
I would hate to think the kind of budget Toyota had set aside for the design and development of the GR Yaris, but the important thing is that they have done it, and it is here. Wonder whether we will ever see anything like it again. Toyota has to get it right, but hard to think that they wouldn't, especially with the pedigree of the expertise, knowledge, and experience that has gone into Toyota's resurgent rally programme.
Toyota won the WRC manufactures title in 2018 and the driver's title in 2019, so logic dictates that they wouldn't have tried to fix something that wasn't broken unless they were confident in repeating those successes. I guess only time will tell, but glad that they took the plunge since everything points to the GR Yaris being an absolute cracker............